Enum FunctionNullBehavior 

pub enum FunctionNullBehavior {
    CalledOnNull,
    ReturnsNullOnNull,
    Strict,
}

How a routine handles a NULL argument. Strict is the exact shorthand for ReturnsNullOnNull, kept distinct so the written spelling round-trips. A Copy leaf enum whose span lives on the owning FunctionOption, like DropBehavior.

Variants

CalledOnNull

CALLED ON NULL INPUT — run the routine even when an argument is null.

ReturnsNullOnNull

RETURNS NULL ON NULL INPUT — return null without running when any argument is null.

Strict

STRICT — shorthand for RETURNS NULL ON NULL INPUT.

Trait Implementations

impl Clone for FunctionNullBehavior

fn clone(&self) -> FunctionNullBehavior

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Copy for FunctionNullBehavior

impl Debug for FunctionNullBehavior

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for FunctionNullBehavior

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Eq for FunctionNullBehavior

impl Hash for FunctionNullBehavior

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl PartialEq for FunctionNullBehavior

fn eq(&self, other: &FunctionNullBehavior) -> bool

Equality operator ==.

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=.

impl Render for FunctionNullBehavior

fn render(&self, _ctx: &RenderCtx<'_>, f: &mut Formatter<'_>) -> Result

Return the render for this value.

fn operand_binding_power(&self) -> Option<BindingPower>

The binding power this node contributes when it appears as an operand, or None (the default) for a self-delimiting node — an atom, call, or constructor — that never needs parentheses.

impl Serialize for FunctionNullBehavior

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl StructuralPartialEq for FunctionNullBehavior